pdfjs-dist/lib/web/pdf_cursor_tools.js

/**
 * @licstart The following is the entire license notice for the
 * Javascript code in this page
 *
 * Copyright 2019 Mozilla Foundation
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 * @licend The above is the entire license notice for the
 * Javascript code in this page
 */
"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.PDFCursorTools = exports.CursorTool = void 0;

var _grab_to_pan = require("./grab_to_pan");

function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }

function _defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } }

function _createClass(Constructor, protoProps, staticProps) { if (protoProps) _defineProperties(Constructor.prototype, protoProps); if (staticProps) _defineProperties(Constructor, staticProps); return Constructor; }

var CursorTool = {
  SELECT: 0,
  HAND: 1,
  ZOOM: 2
};
exports.CursorTool = CursorTool;

var PDFCursorTools =
/*#__PURE__*/
function () {
  function PDFCursorTools(_ref) {
    var _this = this;

    var container = _ref.container,
        eventBus = _ref.eventBus,
        _ref$cursorToolOnLoad = _ref.cursorToolOnLoad,
        cursorToolOnLoad = _ref$cursorToolOnLoad === void 0 ? CursorTool.SELECT : _ref$cursorToolOnLoad;

    _classCallCheck(this, PDFCursorTools);

    this.container = container;
    this.eventBus = eventBus;
    this.active = CursorTool.SELECT;
    this.activeBeforePresentationMode = null;
    this.handTool = new _grab_to_pan.GrabToPan({
      element: this.container
    });

    this._addEventListeners();

    Promise.resolve().then(function () {
      _this.switchTool(cursorToolOnLoad);
    });
  }

  _createClass(PDFCursorTools, [{
    key: "switchTool",
    value: function switchTool(tool) {
      var _this2 = this;

      if (this.activeBeforePresentationMode !== null) {
        return;
      }

      if (tool === this.active) {
        return;
      }

      var disableActiveTool = function disableActiveTool() {
        switch (_this2.active) {
          case CursorTool.SELECT:
            break;

          case CursorTool.HAND:
            _this2.handTool.deactivate();

            break;

          case CursorTool.ZOOM:
        }
      };

      switch (tool) {
        case CursorTool.SELECT:
          disableActiveTool();
          break;

        case CursorTool.HAND:
          disableActiveTool();
          this.handTool.activate();
          break;

        case CursorTool.ZOOM:
        default:
          console.error("switchTool: \"".concat(tool, "\" is an unsupported value."));
          return;
      }

      this.active = tool;

      this._dispatchEvent();
    }
  }, {
    key: "_dispatchEvent",
    value: function _dispatchEvent() {
      this.eventBus.dispatch('cursortoolchanged', {
        source: this,
        tool: this.active
      });
    }
  }, {
    key: "_addEventListeners",
    value: function _addEventListeners() {
      var _this3 = this;

      this.eventBus.on('switchcursortool', function (evt) {
        _this3.switchTool(evt.tool);
      });
      this.eventBus.on('presentationmodechanged', function (evt) {
        if (evt.switchInProgress) {
          return;
        }

        var previouslyActive;

        if (evt.active) {
          previouslyActive = _this3.active;

          _this3.switchTool(CursorTool.SELECT);

          _this3.activeBeforePresentationMode = previouslyActive;
        } else {
          previouslyActive = _this3.activeBeforePresentationMode;
          _this3.activeBeforePresentationMode = null;

          _this3.switchTool(previouslyActive);
        }
      });
    }
  }, {
    key: "activeTool",
    get: function get() {
      return this.active;
    }
  }]);

  return PDFCursorTools;
}();

exports.PDFCursorTools = PDFCursorTools;